Increased complications in pediatric surgery are associated with comorbidities and not with Down syndrome itself

Background: Down syndrome (DS) is a genetic condition associated with multiple comorbidities. While physicians may perceive that DS patients have more postoperative complications, the literature remains unclear. This study compared postoperative complications for children with and without DS who underwent abdominal and thoracic procedures. Methods: The National Surgical Quality Improvement Program Pediatric was queried for patients aged <18 years, who underwent abdominal and noncardiac thoracic operations (by Current Procedural Terminology codes) from 2012 to 2015. The analysis compared patients based on the presence or absence of DS. The primary outcome was a composite of all postoperative complications as defined by the National Surgical Quality Improvement Program Pediatric. The analysis utilized chi-square, Student's t-test, and univariate and multiple logistic regression. Results: There were 91,478 patients included, of which 1476 (1.6%) had a diagnosis of DS. Patients with DS had higher rates of preoperative nutritional support (38.8% versus 15.0%), developmental delay (61.9% versus 10.4%), and cardiac risk factors (76.5% versus 13.8%). The overall rate of postoperative complications was 11.1%, with a greater proportion in DS patients (16.2% versus 10.8%, P < 0.001). On univariate analysis, DS was associated with increased odds of postoperative complications (odds ratio 1.6 95% confidence interval 1.4-1.9) compared with the non-DS group; however, DS was not a risk factor after adjusting for other covariates (adjusted odds ratio 0.86 95% confidence interval 0.7-1.1). Conclusions: A higher proportion of postoperative complications were observed in patients with DS. However, after adjusting for other risk factors, DS was not an independent risk factor. The increased rate of complications is likely related to the presence of multiple comorbidities in DS. (C) 2018 Elsevier Inc. All rights reserved.